Our favorite FBI agents have encounters of the Halloween kind on (casefile) and off (mystery) of work.

All Hallow's Grave by Humbuggie
On All Hallow's Eve, Mulder finds himself to be the centre of a situation that is not so much a case file but resembles nothing more than his eternal grave

Awakenings by Katilina
Every Halloween 25 people die the same way in Ennoble, Oklahoma.

The Broken Glass by Annette Gisby
A Halloween romance, or is it?

The Beginning of the End by Karen
Scully is at a Halloween party and is dragged from it by Mulder, not like she was having a good time anyway... they, in turn, go Ghost hunting.

California Screamin' by abracadabra
Halloween, Mulder style.

Candy Man by RPCrazy and Muskrat
It's the night of October 31, a night when children are trick o' treating but the trick is turned the other way when the parents start disappearing. The case literally landing in their laps through an unexpected turn of fate Special Agents Doggett and Reyes must investigate the disappearances, including finding some of their own.

Cross Your Path by Ann Martin
A black cat leads Mulder and Scully on a Halloween trip.

And Dance By the Light of the Moon by MustangSally & Rivkat
Halloween (mind) candy.

Deputy Dan by Vickie Moseley
It's Halloween night and Mulder and Scully get caught up in a manhunt.

The Dreaming Sea by Revely
The third time Andy saw the savage was the week before Halloween.

First Night In A Lifetime by Dana Doggett
Doggett and Scully are cursed while on an undercover assignment on Halloween night.

Fooling with Time by Kris Beasst
The agents are tricked on Samhain and find themselves in a *very* unique position.

Hard As a Rock by Claire
This is a Halloween challenge story in that it's about a sorta mask.

Haunted Moon by Stephanie Kaiser
Mulder and Scully find themselves lost and in trouble one night under a haunted moon. But when it's all over and done, can they find love?

Hell To Pay by Anonymous
Mulder and Scully investigate a potential serial murder case and Mulder's beliefs are tested by a delusional killer who may have found a way to the other side.

In Darkness by driftster
A Halloween challenge story. Scully experiences a strange nightmare and Mulder reaches out to her when they are reunited.

La Strega by Romantique
A little X Tale for Halloween. Pre Season 7.

A Normal Halloween by Branwell
This is a stand-alone story of Mulder's and Scully's 'normal' 1999 Halloween.

O Spooky Knight by Emmyjean
Early Mulder and Scully. A stakeout. Halloween night. Silliness. What more could anyone ask? Happy Halloween!

Pumpkin Patch by DM
Mulder and Scully go in search of the Headless Horseman. Set in S6 or 7.

The Quintessence of Evil by Foxs_Dana
Fox Mulder and Dana Scully end up out in the middle of nowhere while following a case on Halloween night. Getting a flat tire, they journey up to a mysterious mansion in hopes of getting help. Instead of getting help, they uncover something much more than either one of them could possibly imagine. An evil that could claim both of their souls.

Salad Dressing by D. Agnew
On Halloween, after investigating a mysterious potion, Mulder and Scully are tempted to let their latent feelings run amok.

Someone Beyond by Patty Hayes
A mask draws Mulder to Scully when danger is at hand.

Spooky by bcfan
A Hallowe'en trick and treat.

Staking it Out by frogdoggie